SDR ASAA2017100522190

Service difficulty report · Cusp Web · Boeing 737990

Difficulty date: October 5, 2017
Submitted: October 16, 2017
Operation: Air carrier
Aircraft: N303AS
Make and model: Boeing 737990
Aircraft serial: 30016
Aircraft time: 58,579 hours, 22,838 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Cusp Web
Part number: 147A851024
Condition: Corroded
Location: Bs 887-986
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

R2 DOOR LOWER SILL, FLOOR CUSP WEB BS 950 - 990 HAS SURFACE CORROSION. ACFT GROUNDED. REMOVED CORROSION IAW SRM 51-10-02. FOUND BEYOND LIMITS IAW SRM 53-70-15. FABRICATED A NEW CUSP WEB IAW DWG 147A8510 REV A . REMOVED AND REPLACED THE CUSP WEB IAW SRM 51-40-02, DWG 147A8501 REV-, EA 900-53-19364, REV P1, SOPM 20-43-03, AND SOPM 20-41-02.